LPKW 3.3

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3.3 Volcanic landforms


Vocabulary


shield volcano-a wide, gentally sloped, volcano that produce quiet eruptions
cinder cone-a steep, cone shaped volcano that produce explosive eruptions
composite volcanos-tall, cone-shape volcanoes that produce two layers of material
caldera-a volcano with a huge hole on the top of the volcano
volcanic neck-a deposit of rock on the volcanoes pipe
dike-a slab of volcanic rock made when magma forces itself across rock layers
sill-a slab of volcanic rock made when magma squeezes between layers of rock
batholith-a magma chamber that has aready cooled down

Outline


Volcanic landforms
  • Landforms from lava and ash
      • Many rocks were formed from lava create a variety of landforms
    • Shield volcanoes
      • shield volcanos produce quiet eruptions and they formed the Hawaiian islands
    • Cinder cone volcanoes
      • Cinder cones erupt explosively and may produce ash, cinders, and bombs
    • Composite volcanoes
      • composite volcanoes are tall cone shaped volcanoes which has layers of lava and ash
    • Lava Plateaus
      • some eruptions may form plateaus instean of mountians
      • its made when lava pours out of cracks in the ground
        • eventually, the lava piles up on cooled lava making the plateau higher and higher
    • Calderas
      • calderas are volcanoes that erupt all the magma out of the chamber
      • eventualiy, the top part of the volcano collapses
  • Soils from lava and ash
      • The hard surface of the lava may nreak down to soil to help support plant life
  • Landforms from magma
      • Destructive forces may wear away softer rock and expose hard rock
    • Volcanic necks, dikes and sills
      • volcanic necks harden in volcinic necks
      • Dikes and sill push through layers of rock
    • Bathotiths
      • bathotiths are cooled magma chambers that that creates many mountian ranges
    • Dome mountains
      • When magma is blocked by layers of rocks it pushes up the rock forming Dome mountains